I posted this in my original baggage thread that has since been expanded on.
Well the good news is that BA will sell you an extra seat, the one right next to you in fact so that you can breathe out. This is also useful for people who have a medical condition that requires you to need a another seat(s). The easiest thing to do in these situations is call BA or your experienced travel agent and get them to do the booking for you.
E&OE
The BA site (
http://www.britishairways.com/en-gb/...ving-your-seat) says:
Booking an extra seat for additional personal space
Please
contact us (or your travel agent) to make a booking for an extra seat as this type of booking cannot be made online.
If you arrive at the airport and haven't booked an extra seat in advance, please speak to a British Airways representative. If there are seats available in the cabin you are travelling in, you may be able to buy an extra seat.